JP2003065210A - Speed change gear for wind power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speed change gear for a generator capable of obtaining the large speed increase ratio, and capable of obtaining good-quality generating electric power by rotating the generator at a rated rotating speed regardless of wear wind time and strong wind time. SOLUTION: This wind power generator 1 connects a generator 16 to a main shaft 12 of a rotor 11 having a blade 10 via a speed change gear 13, and is constituted so that the speed change gear 13 has a fixed gear ratio type step-up gear (a fixed gear ratio type traction drive) 14, and a variable gear ratio type step-up gear (a variable gear ratio type traction drive) 15, and the fixed gear ratio type step-up gear (the fixed gear ratio type traction drive) 14 is arranged on the rotor 11 side to the variable gear ratio type step-up gear (the variable gear ratio type traction drive) 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission for a wind power generator, and more particularly to a speed increase for a wind power generator for increasing the rotation of a rotor that receives wind to rotate the generator at a rated speed. Regarding the machine.

[0002]

2. Description of the Related Art Generally, a wind power generator has a structure shown in FIG. Prop 102 erected on the ground 101
A yoke drive device 103 is provided on the upper part of the rotor 10, and a rotor 10 having a blade 104 on the yoke drive device 103 is provided.
5 and the rotation speed (rotation speed) of the main shaft 106 of the rotor 105
A transmission 107 for increasing the speed and a generator 108 for generating power at the rated speed increased by the transmission 107 are provided. Incidentally, 109 is a transmission 107 and a generator 108.
It is a nacelle that stores components such as.

[0003] In this wind power generator 100, a blade 104 attached to a rotor 105 receives a wind to obtain a lift force, and the lift force causes a rotational force to be generated in a main shaft 106. The speed is increased at 107, and the generator 108 obtains the rated rotation speed to generate electricity. Conventionally,
As the transmission 107, a gear type gearbox such as a multi-axis gear type gearbox or a planetary gear type gearbox is generally used.

At present, the wind generator 100 includes a rotor 10
The variable speed method in which the rotation speed of the generator 108 changes according to the wind speed received by the blade 104 without controlling the rotation speed of No. 5, and the rotation speed of the generator 108 is kept constant at a wind speed above a certain level. There is a "control method" for controlling. The latter "control method" for controlling the number of revolutions further includes a "variable pitch control method" and a "stall control method". Less than,
These methods will be described. The rotational speed of the “variable speed type” rotor 105 constantly changes as the wind speed changes. Therefore, a wind turbine generator equipped with a gearbox having a constant gear ratio such as a gear type gearbox as the transmission 107 causes a decrease in the number of rotations of the generator when wind power is weak, resulting in a decrease in power generation efficiency. On the contrary, when the wind power is strong, it causes excessive rotation of the generator, which causes a failure such as seizure of the coil. In either case, the generator speed may deviate from the rated speed at which good power can be obtained, so it is difficult to always perform efficient operation. Therefore, the variable-speed wind power generation system is provided with a special electric circuit that uses an expensive converter or inverter together to obtain high-quality electric power, and exchanges electric power from a battery or the like. "Variable Pitch Control Method" The variable pitch control method controls the pitch of the blades 104 as necessary at a wind speed of a certain level or higher and allows the wind received by the blades 104 to escape, so that the rotation speed of the generator 108 is the rated speed. It is controlled so as not to exceed the number. "Stall control method" The stall control method is a method in which when the wind blows at a certain speed or higher, the resistance blades are opened by centrifugal force to function as an aerodynamic brake, and the number of rotations of the generator is reduced.

The variable pitch control system and the stall control system described above can efficiently obtain high-quality electric power by combining a converter and an inverter if the wind blows at a certain speed or more, but if the wind is weak, Since the generator speed is below the rated speed, the power generation efficiency is reduced.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Gear transmissions such as multi-shaft gear type gearboxes and planetary gear type gearboxes are conventionally used as transmissions for generators. When used, there are the following problems.

1. Generation of noise and vibration due to tooth engagement 2. Deterioration of power quality due to generation of higher harmonic component output due to tooth meshing The generation of noise and vibration in the gear type gearbox of the wind power generator is mainly due to gear meshing. Therefore, measures such as improving the shape and dimensional accuracy of the teeth are taken, but noise and vibration cannot be completely eliminated. Therefore, as another measure, a vibration damping material or a soundproofing material is attached to the nacelle 109 or the column 102. Has been applied, such as pasting
These measures increase costs. Further, the generation of harmonic components due to the meshing of teeth requires expensive converters and inverters having a filtering function for removing the harmonics, resulting in high cost of the wind power generator system.

Problem of Fixed Gear Ratio Type Gearbox As shown in FIG. 6 (a), a gearbox is mainly used for a variable speed type gearbox or a windturbine gearbox which controls the number of revolutions of the generator at a constant wind speed or more. A fixed gear ratio type speed increaser 107A having a fixed ratio is mounted. As the fixed gear ratio type speed increaser 107A, a planetary roller as shown in FIG. A model traction drive 110 is used. This planetary roller type traction drive 110 has an outer ring 1 with its axis aligned around the sun roller 111.
12 are arranged, and a plurality of planetary rollers 1 are provided in a space formed between the sun roller 111 and the outer ring 112.
13, a carrier 115 having a planetary roller support shaft 114 for rotatably arranging the planetary rollers 113 at equal intervals in the circumferential direction, and the carrier 1
15 has an input shaft (low-speed rotation shaft) 116 integrally formed with the outer ring 112, and the input shaft (low-speed rotation shaft) 116 is rotationally driven to rotate the sun roller 111 to the output shaft (high-speed rotation shaft). The shaft is rotated at an increased speed.

However, the planetary roller traction drive 11 is used as the fixed gear ratio type speed increaser 107A.
There are the following problems in the wind power generator equipped with 0.

1. Reduction of power generation efficiency when the wind is weak 2. Maximum generator capacity over strong wind (variable speed method only) That is, during low wind, the generator rotation speed does not reach the rated rotation speed, so the power generation efficiency decreases. On the other hand, when the wind speed is constant or higher, in the variable speed type wind power generator, the generator rotation speed increases as the wind speed increases, which may cause coil burnout. However, with generator pitch control methods such as variable pitch control method and stall control method,
When the wind becomes strong, the generator rotation speed is controlled so as not to exceed the rated rotation speed, so the power generation capacity will not be exceeded.

Therefore, according to the present invention, a high speed increasing ratio is obtained, the power is not reduced in a weak wind, and the generator speed is controlled so as not to exceed the rated speed in a strong wind. The purpose is to provide.

[0012]

In order to solve the above-mentioned problems, a transmission for a generator according to a first aspect of the present invention has the following features.
A wind power generator including a rotor that receives wind and rotates, and a generator that generates electric power by the rotational force of the rotor. At least one ratio type traction drive and at least one variable speed ratio type traction drive are provided, and the fixed speed ratio type traction drive is arranged on the rotor side with respect to the variable speed ratio type traction drive. It is

According to the generator transmission having the above structure, the rotational speed increased by the fixed gear ratio type traction drive is further increased by the variable gear ratio type traction drive, so that a large gear ratio is obtained. Even when the wind is weak, the generator can be rotated at the rated speed to generate a predetermined amount of power. Also, if the wind is excessive, change the speed increase ratio of the variable gear ratio type traction drive,
You can always get good quality electricity. Further, by disposing the fixed gear ratio type traction drive having a large torque transmission capacity on the rotor side, the transmission capacity of the variable gear ratio type traction drive having a small torque transmission capacity can be made small and sufficient durability can be obtained. . Furthermore, it has less noise and vibration than the conventional gear type gearbox.

According to a second aspect of the present invention, there is provided a transmission for a generator characterized in that the fixed gear ratio type traction drive is a planetary roller type traction drive.

According to the generator transmission having the above structure, a large torque can be transmitted by the planetary roller type traction drive having a simple structure and a large torque transmitting capacity, and the torque transmission of the variable gear ratio type traction drive can be performed. The amount can be reduced and sufficient durability can be obtained.

A transmission for a generator according to a third aspect of the present invention is characterized in that the variable gear ratio type traction drive is a cone type or toroidal type traction drive.

According to the generator transmission having the above structure, the cone type or toroidal type traction drive continuously changes the speed increasing ratio even when the wind power is large, thereby rotating the generator at the rated speed. Therefore, it is possible to obtain high-quality generated power.

The above structure and operation will be described in detail below. For example, in a typical wind power generator, it is several tens to 1 per minute.
In order to accelerate the rotor rotation speed of 00 rotations to the generator rated rotation speed by the transmission, the transmission needs to have a speed increasing ratio of about 5 to 20. There is a structural limit to obtaining such a high speed increasing ratio with one variable speed ratio type traction drive (continuously variable transmission) (a toroidal type is not possible,
Cone type is acceptable).

In the cone type traction drive, it is possible mechanically to obtain a relatively large speed increasing ratio, but when comparing speed increasing gears of the same size, the torque transmitting capacity decreases as the speed increasing ratio increases. Therefore, even if one cone type traction drive realizes a high speed increasing ratio, the size in the radial direction must be increased in order to secure sufficient durability.

For the above reasons, in order to construct a continuously variable gearbox having a high speed increasing ratio and being as small as possible, a fixed gear ratio type traction drive (planetary roller type traction drive) having a large torque transmission capacity is constructed. Etc.) and a variable gear ratio type traction drive (cone type or toroidal type traction drive) are effective.

Since the traction drive is a mechanism for transmitting power through the oil film, it is necessary to apply a large normal force to the contact portion. Generally, in a variable gear ratio traction drive, spin occurs at any of the contact portions. "Spin" is a phenomenon in which a relative rotation component around the normal line at the center of the contact portion that does not contribute to power transmission occurs, and this spin causes a decrease in traction and an increase in power loss at the contact portion. Since the influence of spin largely depends on the size and shape of the contact ellipse, in order to reduce the power loss due to spin and improve the transmission efficiency of the transmission, the contact area is reduced and the direction of the peripheral speed is reduced. It is necessary to reduce the width of the contact area in both the peripheral speed and the perpendicular direction.

In order to extend the rolling fatigue life of the contact portion, it is necessary to reduce the contact surface pressure. For the above reasons, the variable transmission ratio type traction drive is designed to reduce power loss and improve durability.
Compared to other transmissions (such as gear type gearboxes or planetary roller traction drives), they tend to be larger in size.

On the other hand, a fixed gear ratio type traction drive (such as a planetary roller type traction drive) is a speed increaser having a constant gear ratio, but no spin is generated at the contact portion or the generated spin is reduced. Design is possible. Therefore, by making the contact state a line contact, it is possible to reduce the contact surface pressure without reducing the efficiency. As a result, the size is smaller than that of the variable transmission ratio type traction drive having the same torque transmission capacity. Can be converted. In other words, the torque transmission capacity of a fixed gear ratio traction drive is generally
It can be said that it is larger than the torque transmission capacity of the variable gear ratio traction drive.

When a traction drive is used as a transmission for a wind power generator, a fixed gear ratio type traction drive (planetary roller type traction drive) and a variable gear ratio type traction drive (cone type or toroidal type traction drive) are combined. Thus, a high speed increasing ratio suitable for a wind power generator can be obtained. Further, a fixed gear ratio type traction drive having a larger transmission capacity than the variable gear ratio type traction drive is provided on the low speed side having a large transmission torque, and the variable gear ratio type traction drive is arranged on the high speed side. With such a configuration, the torque transmitted to the variable gear ratio traction drive can be reduced, and as a result, the radial size of the entire transmission can be reduced.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A transmission for a wind turbine generator according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a wind turbine generator 1 using the transmission for wind turbine generator of the present invention. In FIG.
The rotor 11 to which the blade 10 is fixed rotates when the blade 10 receives wind, and the main shaft 12 rotates. Reference numeral 13 is a transmission according to the present invention, in which a traction drive type fixed gear ratio type speed increaser (fixed gear ratio type traction drive) 14 is arranged on the rotor 11 side, and its output side, that is, the generator 16 side. A traction drive type variable gear ratio type speed increaser (variable gear ratio type traction drive) 15 is arranged.

As the fixed gear ratio type speed increaser 14, for example, a planetary roller type traction drive is used,
As the variable gear ratio type speed increaser 15, for example, a cone type traction drive or a toroidal type traction drive is used.

FIG. 2 is an exploded perspective view of a planetary roller type traction drive 140 used as the fixed gear ratio type speed increaser 14. In this planetary roller traction drive 140, an outer ring 142 having a rolling surface on its inner peripheral portion with its axial center aligned is arranged around a sun roller 141 having a rolling surface on its outer peripheral portion. A plurality of planet rollers 143 having a rolling surface on the outer peripheral portion are arranged in a space formed between the ring 142 and
These planet rollers 143 are arranged at equal intervals in the circumferential direction, and
It has a carrier 145 having a planetary roller support shaft 144 for holding it rotatably, and an input shaft (low-speed rotation shaft) 146 formed integrally with this carrier 145.

This planetary roller type traction drive 1
In 40, the outer ring 142 is fixed and the input shaft (low-speed rotation shaft) 146 is rotationally driven,
The planetary roller 143 is rotated at an increased speed, and the rotation of the planetary roller 143 causes the sun roller 141 in pressure contact with the planetary roller 143 to be rotated at an increased speed as an output shaft (high-speed rotation shaft).

FIG. 3 is a vertical sectional view of a cone type traction drive 150 as an example of the variable speed ratio type speed increasing gear 15. This cone type traction drive 150
The outer ring 152 is fixed to the input shaft (low-speed rotation shaft) 151 and has a rolling surface formed on the inner peripheral portion, and the outer ring 152 is fixed to the output shaft (high-speed rotation shaft) 153 and has a rolling surface formed on the outer peripheral portion. A plurality of double cones 15 having a sun roller 154, a conical surface 155a that is in pressure contact with the sun roller 154, and a conical surface 155b that is in pressure contact with the outer ring 152.
5, a flange portion 157a supporting one end portion 156a of the double cone rotation shaft 156, and a flange portion 157b supporting the other end portion 156b of the rotation shaft 156, which is not rotatable with respect to the input shaft and has an axial direction. A carrier 157 slidably attached to the support shaft, a support cam 159 fixed to the output shaft (high-speed rotation shaft) 153, and a variable pressurizing mechanism interposed between the support cam 159 and the sun roller 154. A torque cam 160, a rack 161 formed on the carrier 157, and a pinion gear 162 meshingly coupled to the rack 161 are provided. The carrier 157 is provided slidably in the input / output axis direction with respect to a carrier mounting member 164 which is a stationary member such as a housing.

The inclination angle θ1 formed by the line segment Y1 passing through the contact portion between the outer ring 152 and the double cone 155 and the line segment X1 parallel to the input / output axis passes through the contact portion between the double cone 155 and the sun roller 154. It is equal to the inclination angle θ2 formed by the line segment Y2 and the line segment X2 parallel to the input / output axis (θ1
= Θ2).

That is, the conical surface 1 of the double cone 155.
The normal line of 55a and the normal line of the conical surface 155b are parallel to each other, and the double cone 155 can be slid in the input / output axial direction. By sliding the double cone 155, the sun roller 154 on the conical surface 155a can be slid.
It is possible to move the contact portion with and the contact portion with the outer ring 152 on the conical surface 155b.

The normal force F1 at the contact portion between the outer ring 152 and the double cone 155 is perpendicular to the line segment Y1 passing through the contact portion between the outer ring 152 and the double cone 155.

Similarly, the normal force F2 at the contact portion between the double cone 155 and the sun roller 154 is perpendicular to the line segment Y2 passing through the contact portion between the double cone 155 and the sun roller 154.

This cone type traction drive 150
When the input shaft (low speed rotation shaft) 151 is rotationally driven, the outer ring 152 fixed to the input shaft (low speed rotation shaft) 151 rotates, and the outer ring 152
The rotation of the double cone 155 that is pressed against the outer ring 152 causes the double cone 155 to rotate.
The rotation of the sun roller 154 causes the output shaft (high-speed rotation shaft) 153 to rotate at an increased speed. The speed increasing ratio e of the cone type traction drive 150 is given by the following equation.

[0036]

[Formula 1]

That is, the radius of rotation dimension d from the axis of the input shaft (low-speed rotation shaft) 151 to the contact portion between the rolling surface formed on the inner peripheral portion of the outer ring 152 and the conical surface 155b of the double cone 155 is Since the rolling radius dimension c from the contact portion between the rolling surface formed on the inner peripheral portion of the outer ring 152 and the conical surface 155b of the double cone 155 to the rotation axis of the double cone 155 is significantly large, (D> c), the double cone 155 is the outer ring 15
Speed is increased from 2 rpm.

When the radius of rotation a from the axis of the output shaft (high speed rotation shaft) 153 to the contact portion between the conical surface 155a of the double cone 155 and the sun roller 153 is larger than the radius of rotation b, , Double cone 155
The speed is slightly reduced between the sun roller 153 and the sun roller 153, but due to the speed-up effect of the double cone 155 on the outer ring 152 and the speed-up effect between the conical surfaces 155b and 155a of the double cone 155, The rotation speed of the output shaft (high speed rotation) 153 is increased with respect to the input shaft (low speed rotation shaft) 151.

Further, the conical surface 155 of the double cone 155
The normal line of a and the normal line of the conical surface 155b are parallel to each other, and as described above, the pinion gear 162 is rotationally driven, and the carrier 157 is input / output shaft via the rack 161 meshingly coupled with the pinion gear 162. Can slide in any direction. By sliding the carrier 157 in the input / output axis direction, the double cone 155 is slid in the input / output axis direction to change the radius gyrations b and c, so that the speed increasing ratio is continuously changed. You can

In this way, in the wind power generator 1 using the transmission 13 of the present invention shown in FIG. 1, the rotation speed of the main shaft 12 due to the rotation of the blades 10 is adjusted by the fixed speed ratio type speed increasing gear 14 and the variable speed changing gear. Since the ratio type speed increaser 15 can increase the speed at a high speed increasing ratio, it is possible to rotate the generator 16 at the rated speed to generate electricity even in a weak wind. Also, input side (low speed side)
Since the fixed gear ratio type speed increaser 14 having a large torque transmission capacity is arranged on the output side and the variable gear ratio type speed increaser 15 is arranged on the output side (high speed side), a large torque transmission is achieved by the fixed gear ratio type speed increaser 14. The capacity is obtained, and since excessive torque is not transmitted to the variable speed ratio type speed increasing gear 15, sufficient durability is obtained. Furthermore, when the rotation speed of the rotor 11 increases during strong winds, the pinion gear 162 can be rotationally driven to control the rotation speed so as not to exceed the rated rotation speed, thereby generating a constant power over a wide range of wind speeds. Since power can be obtained, it becomes possible to obtain high-quality power with high efficiency. Furthermore, compared to the conventional gear type gearbox, the combination of rollers / rollers reduces noise and vibration.

In the above-described embodiment, the cone type traction drive 150 is used as the variable speed ratio type speed increasing gear 15.
The case of using the toroidal traction drive 17 as shown in FIGS.
You may use 0,180.

The toroidal traction drive 170 shown in FIG. 4A is composed of an input side disk 172 attached to an input shaft (low speed rotating shaft) 171 and an output side disk 174 attached to an output shaft (high speed rotating shaft) 173. The opposing surface is formed in a concave shape, and a roller 175 having an outer peripheral portion formed in a convex shape is arranged between the disks 172 and 174. The roller 175 is rotatably attached to a rotating shaft 177 via a bearing 176.

In the toroidal traction drive 170 described above, since the roller 175 is inclined with respect to the input / output axis, the input side of the roller 175 is pressed against the outer diameter side of the disk 172, and the roller 175 has the same diameter. Since the output side is in pressure contact with the inner diameter side of the disk 174, the rotation of the disk 172 causes the roller 175 to rotate at an increased speed, and the rotation of the roller 175 causes the disk 174 to rotate.
Is rotated at an increased speed with respect to the disk 172. Therefore, the output shaft (high-speed rotation shaft) 173 can be rotated at a higher speed by rotationally driving the input shaft (low-speed rotation shaft) 171. Moreover, by changing the inclination angle of the roller 175 with respect to the input / output axis,
It is possible to change the position of the contact portion between the disk 172 and the disk 174, and thereby to change the speed increasing ratio.

The toroidal traction drive 180 shown in FIG. 4B has an input side disk 182 attached to an input shaft (low speed rotating shaft) 181 and an output side disk 184 attached to an output shaft (high speed rotating shaft) 183. An outer peripheral surface is formed in a concave shape, and a roller 185 having an outer peripheral portion formed in a convex shape is arranged between the disks 182 and 184, and the roller 185 is provided with a roller support member 187 via a rolling element 186 such as a steel ball. It is attached to.

In the toroidal traction drive 180 described above, since the roller 185 is inclined with respect to the input / output shaft center, the input side of the roller 185 is pressed against the outer diameter side of the disk 182, and the roller 185 is rotated. Since the output side is in pressure contact with the inner diameter side of the disc 184, the rotation of the disc 182 accelerates the roller 185, and the rotation of the roller 185 causes the disc 184 to rotate.
Is rotated with respect to the disk 182 at an increased speed. Therefore, the output shaft (high-speed rotation shaft) 183 can be rotated at a higher speed by rotationally driving the input shaft (low-speed rotation shaft) 181. Moreover, by changing the inclination angle of the roller 185 with respect to the input / output axis,
It is possible to change the position of the contact portion with the disk 182 and the disk 184, and thereby to change the speed increasing ratio.

Therefore, FIG. 4A or FIG.
Toroidal type traction drive 170 shown in (b)
Alternatively, when 180 is used instead of the cone type traction drive 150 of FIG. 3, a high speed increasing ratio is similarly obtained,
In addition, when the wind is strong, the generator 16 can be constantly rotated at the rated speed to generate power by changing the inclination angle of the rollers 175 and 185.

In the above embodiment, the fixed gear ratio type speed increaser (fixed gear ratio type traction drive) 14 and the variable gear ratio type speed increaser (variable gear ratio type traction drive) are used.
Although the case where 15 and 15 are used one by one has been described, a plurality of each may be used.

[0048]

INDUSTRIAL APPLICABILITY As described above, the present invention provides a wind power generator including a rotor that receives wind and rotates, and a generator that generates power by the rotational force of the rotor, between the rotor and the generator. In the transmission for a wind power generator installed in the vehicle, at least one fixed gear ratio traction drive and at least one variable gear ratio traction drive are provided, and the fixed gear ratio traction drive is the variable gear ratio traction drive. Since it is arranged on the rotor side with respect to the drive, it is possible to obtain a large speed increasing ratio even in a weak wind by the speed increasing ratio of a plurality of traction drives, and the generator is rated. It can be rotated. Further, when the wind is strong, the number of revolutions can be reduced by the variable gear ratio traction drive, and the generator can be operated at the rated number of revolutions, so that high-quality generated power can be obtained. Furthermore, the fixed gear ratio traction drive, which has a large torque transmission capacity, is arranged on the rotor side with respect to the variable gear ratio traction drive, so that a large torque transmission capacity can be obtained and the transmission torque of the variable gear ratio traction drive can be obtained. The durability can be improved by reducing the size. Moreover, compared to the gear type gearbox, since the power is transmitted between the rollers / rollers, noise and vibration are reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a wind power generator using a transmission for a wind power generator of the present invention.

FIG. 2 is an exploded perspective view of a planetary roller traction drive that is an example of a fixed gear ratio type speed increaser in the wind power generator shown in FIG.

3 is a vertical cross-sectional view of a cone type traction drive which is an example of a variable speed ratio type speed increaser in the wind power generator shown in FIG.

4 (a) is a longitudinal cross-sectional view of a main part of a toroidal traction drive that is another example of the variable speed ratio type speed increaser in the wind power generator shown in FIG. 1, and FIG. 4 (b) is the wind power generation shown in FIG. FIG. 6 is a longitudinal sectional view of a main part of a toroidal type traction drive which is still another example of the variable transmission ratio type speed increaser in the machine.

FIG. 5 is a side view of a conventional wind power generator.

FIG. 6 (a) is a schematic configuration diagram of a conventional wind power generator,
(B) is an exploded perspective view of a fixed gear ratio type traction drive which is an example of a fixed gear ratio type gearbox.

[Explanation of symbols]

1 Wind Power Generator 10 Blade 11 Rotor 12 Spindle 13 Transmission 14 Fixed Gear Ratio Type Gearbox (Fixed Gear Ratio Traction Drive) 15 Variable Gear Ratio Gearbox (Variable Gear Ratio Traction Drive) 16 Generator 140 Fixed Gear ratio type traction drive (planetary roller type traction drive) 141 Sun roller (output shaft, high speed rotating shaft) 142 Outer ring (fixed ring) 143 Planetary roller 144 Planetary roller support shaft 145 Carrier 146 Input shaft (low speed rotating shaft) 150 Variable speed change Ratio type Traction drive (cone type traction drive) 151 Input shaft (low speed rotating shaft) 152 Outer ring 153 Output shaft (high speed rotating shaft) 154 Sun roller 155 Double cone 157 Carrier 161 Rack 162 Pinion gear 170, 180 Variable speed ratio type Lac Deployment drive (toroidal traction drive) 171 and 181 the input shaft (low speed shaft) 172, 182 output shaft (high speed shaft) 173,183 input side disk 174 and 184 output-side disks 175, 185 roller

Continued front page    F term (reference) 3H078 AA02 AA26 BB11 BB12 BB13                       CC13 CC22                 3J062 AA60 AB15 AB16 AB35 AC03                       BA16 BA21 BA25 BA26 CG32                       CG38 CG39 CG81

Claims (3)

[Claims] 1. A speed changer for a wind power generator, which is interposed between the rotor and the power generator, the wind power generator including a rotor that receives wind and rotates, and a power generator that generates electric power by the rotational force of the rotor. The machine has at least one fixed gear ratio type traction drive and at least one variable gear ratio type traction drive,
The fixed transmission ratio type traction drive is arranged on the rotor side with respect to the variable transmission ratio type traction drive. 2. The fixed gear ratio traction drive is a planetary roller traction drive.
The transmission for a wind power generator according to. 3. The transmission for a wind power generator according to claim 1, wherein the variable gear ratio traction drive is a cone type or toroidal type traction drive.